专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20070198274A1 Scalable audio coding 失效
标题翻译：可扩展音频编码
公开(公告)号：US20070198274A1
公开(公告)日：2007-08-23
申请号：US11573570
申请日：2005-07-25
申请人： Steven Leonardus Josephus Van De Par , Valery Kot , Nicolle Van Schijndel
发明人： Steven Leonardus Josephus Van De Par , Valery Kot , Nicolle Van Schijndel
IPC分类号： G10L21/00
CPC分类号： G10L19/028 , G10L19/03 , G10L19/24 , G10L21/038
摘要： The invention relates to an audio encoder and decoder and methods for audio encoding and decoding. In a preferred encoder embodiment an audio signal is encoded by deterministic encoder means to form a first encoded signal part. A spectrum of the audio signal is determined and represented by an excitation pattern, i.e. spectral values corresponding to human auditory filters, as a second encoded signal part. A masking curve is also extracted based on the excitation pattern, thus improving encoding efficiency in terms of bit rate. In a preferred decoder the first encoded signal part is decoded by deterministic decoder means. A noise generator uses the decoded first signal part together with the second signal part, i.e. the excitation pattern for the original audio signal, to generate a noise signal. The noise signal is then added to the first decoded signal part to form an output audio signal. At the decoder side the masking curve is also extracted based on the second encoded signal part, i.e. the excitation pattern. The noise signal is generated so that the output audio signal exhibits an excitation pattern nearly identical to the original audio signal. Thus, a perceived high quality audio is obtained while the encoded signal is scalable since a possible deviation between encoding and decoding of the first signal part is compensated by the noise generator at the decoder side. In preferred embodiments the coding means comprises a sinusoidal coder.
摘要翻译：本发明涉及音频编码器和解码器以及用于音频编码和解码的方法。在优选的编码器实施例中，音频信号由确定性编码器装置编码以形成第一编码信号部分。作为第二编码信号部分，由激励模式（即对应于人类听觉滤波器的频谱值）确定和表示音频信号的频谱。还基于激励模式提取掩蔽曲线，从而提高了比特率方面的编码效率。在优选的解码器中，第一编码信号部分由确定性解码器装置解码。噪声发生器使用解码的第一信号部分与第二信号部分，即原始音频信号的激励模式一起产生噪声信号。然后将噪声信号添加到第一解码信号部分以形成输出音频信号。在解码器侧，也基于第二编码信号部分即激励图案提取掩蔽曲线。产生噪声信号，使得输出音频信号呈现与原始音频信号几乎相同的激励图案。因此，在编码信号是可缩放的情况下获得感知的高质量音频，因为第一信号部分的编码和解码之间的可能偏差由解码器侧的噪声发生器补偿。在优选实施例中，编码装置包括正弦编码器。

2. 发明申请

US20080097763A1 Combined Audio Coding Minimizing Perceptual Distortion 有权
标题翻译：组合音频编码最小化感知失真
公开(公告)号：US20080097763A1
公开(公告)日：2008-04-24
申请号：US11575149
申请日：2005-09-02
申请人： Steven Leonardus Josephus Van De Par , Nicolle Van Schijndel , Valery Kot , Richard Heusdens
发明人： Steven Leonardus Josephus Van De Par , Nicolle Van Schijndel , Valery Kot , Richard Heusdens
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/22
摘要： An audio encoder in which two or more preferably different encoders cooperate to generate a joint encoded audio signal. Encoding parameters of the two or more encoders are optimized in response to a measure of distortion of the joint encoded audio signal in accordance with a predetermined criterion. The distortion. measure is preferably a perceptual distortion measure. In one encoder embodiment comprising a sinusoidal and a waveform encoder, a constant total bit rate for each audio frame is distributed between the two encoders so as to minimize perceptual distortion for both the first and the second encoder. Other embodiments consider a set of encoding parameters that is larger than only those that minimize the perceptual distortion of the first encoder. In some embodiments, perceptual distortion may be minimized by optimizing encoding via optimizing entire encoding templates, i.e. a complex set of encoding parameters, for the separate encoders. The separate encoders may either be cascaded or operate in parallel, or in a combination of these. Two or more audio segments are preferably taken into account in the optimizing procedure. A corresponding audio decoder comprises separate decoders corresponding to the separate encoders of the audio encoder that encoded the audio signal. Decoded signal parts from these decoders are then added to produce the final audio signal. The presented audio encoding is efficient and provides a high sound quality because the encoding scheme is flexible and adapts to specific demands for each audio excerpt.
摘要翻译：一种音频编码器，其中两个或更多个优选地不同的编码器协作以产生联合编码的音频信号。响应于根据预定标准对联合编码音频信号的失真的测量，优化两个或更多个编码器的编码参数。失真。度量优选是感知失真度量。在包括正弦曲线和波形编码器的一个编码器实施例中，每个音频帧的恒定总比特率分布在两个编码器之间，以便最小化第一和第二编码器的感知失真。其他实施例考虑一组编码参数，其大于仅使最小化第一编码器的感知失真的编码参数。在一些实施例中，可以通过优化编码，通过优化整个编码模板（即编码参数的复杂集合）来分离编码器来最小化感知失真。单独的编码器可以级联或并联操作，也可以组合使用。在优化过程中优选考虑两个或多个音频段。对应的音频解码器包括对应于编码音频信号的音频编码器的分离编码器的单独的解码器。然后添加来自这些解码器的解码信号部分以产生最终音频信号。所呈现的音频编码是有效的并且提供高音质，因为编码方案是灵活的并且适应于每个音频片段的特定需求。

3. 发明申请

US20060015328A1 Sinusoidal audio coding 审中-公开
标题翻译：正弦音频编码
公开(公告)号：US20060015328A1
公开(公告)日：2006-01-19
申请号：US10536241
申请日：2003-10-29
申请人： Nicolle Van Schijndel , Mireia Gomez Fuentes , Steven Leonardos Josephus Van De Par , Andreas Gerrits , Valery Kot
发明人： Nicolle Van Schijndel , Mireia Gomez Fuentes , Steven Leonardos Josephus Van De Par , Andreas Gerrits , Valery Kot
IPC分类号： G10L19/08
CPC分类号： G10L19/093 , G10L19/0208
摘要： Coding of an audio signal (x) represented by a respective set of sampled signal values for each of a plurality of sequential segments is disclosed. The sampled signal values are used to determine sinusoidal components (CS) for each of the plurality of sequential segments. The sinusoidal components (CS) are subtracted from the sampled signal values to provide a set of values (s1, s2) representing afirst residual component (x3) of the audio signal. The first residual component (x3) is conditioned (18) to remove selected tonal components and to provide a set of values (s1′, s2′) representing a second residual component (x3′) of the audio signal. The second residual component is modelled (14) by determining noise parameters (CN) approximating the second residual component (x3′); and an encoded audio stream (AS) is generated including the noise parameters (CN) and the codes representing the sinusoidal components (CS).
摘要翻译：公开了由多个连续段中的每一个的相应的一组采样信号值表示的音频信号（x）的编码。采样的信号值用于确定多个连续段中的每一个的正弦分量（CS）。从采样的信号值中减去正弦分量（CS），以提供表示音频信号的第一残差分量（x 3）的一组值（s 1，s 2）。对第一残余分量（x 3）进行调节（18）以去除所选择的音调分量，并提供表示音频信号的第二残余分量（x 3'）的一组值（s 1'，s 2'）。通过确定近似第二残余分量（x 3'）的噪声参数（CN）来对第二残差分量进行建模（14）。并且生成包括噪声参数（CN）和代表正弦分量（CS）的代码的编码音频流（AS）。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式